BC857T
Nov-29-2001
1
PNP Silicon AF Transistor
For AF input stages and driver applications
High current gain
Low collector-emitter saturation voltage
Complementary types: BC847...T
VPS05996
1
2
3
Type
Marking
Pin Configuration
Package
BC857AT
BC857BT
3Es
3Fs
1 = B
1 = B
2 = E
2 = E
3 = C
3 = C
SC75
SC75
Maximum Ratings
Parameter
Symbol
Value
Unit
Collector-emitter voltage
V
CEO
45
V
Collector-base voltage
V
CBO
50
Collector-emitter voltage
V
CES
50
Emitter-base voltage
V
EBO
5
DC collector current
I
C
100
mA
Peak collector current
I
CM
200
Total power dissipation
, T
S
= 109 °C
P
tot
250
mW
Junction temperature
T
j
150
°C
Storage temperature
T
stg
-65 ... 150
Thermal Resistance
Junction - soldering point
1)
R
thJS
165
K/W
1For calculation of R
thJA
please refer to Application Note Thermal Resistance
BC857T
Nov-29-2001
2
Electrical Characteristics
at T
A
= 25 °C, unless otherwise specified.
Parameter
Symbol
Values
Unit
min.
typ.
max.
DC characteristics
Collector-emitter breakdown voltage
I
C
= 10 mA, I
B
= 0
V
(BR)CEO
45
-
-
V
Collector-base breakdown voltage
I
C
= 10 µA, I
E
= 0
V
(BR)CBO
50
-
-
Collector-emitter breakdown voltage
I
C
= 10 µA, V
BE
= 0
V
(BR)CES
50
-
-
Emitter-base breakdown voltage
I
E
= 1 µA, I
C
= 0
V
(BR)EBO
5
-
-
Collector cutoff current
V
CB
= 30 V, I
E
= 0
I
CBO
-
-
15
nA
Collector cutoff current
V
CB
= 30 V, I
E
= 0 , T
A
= 150 °C
I
CBO
-
-
5
µA
DC current gain
I
C
= 10 µA, V
CE
= 5 V
BC857AT
BC857BT
h
FE
-
-
140
250
-
-
-
DC current gain
I
C
= 2 mA, V
CE
= 5 V
BC857AT
BC857BT
h
FE
125
220
180
290
250
475
Collector-emitter saturation voltage1)
I
C
= 10 mA, I
B
= 0.5 mA
I
C
= 100 mA, I
B
= 5 mA
V
CEsat
-
-
75
250
300
650
mV
Base-emitter saturation voltage 1)
I
C
= 10 mA, I
B
= 0.5 mA
I
C
= 100 mA, I
B
= 5 mA
V
BEsat
-
-
700
850
-
-
Base-emitter voltage
I
C
= 2 mA, V
CE
= 5 V
I
C
= 10 mA, V
CE
= 5 V
V
BE(ON)
600
-
650
-
750
820
1) Pulse test: t < 300
s; D < 2%
BC857T
Nov-29-2001
3
Electrical Characteristics at T
A
= 25 °C, unless otherwise specified.
Parameter
Symbol
Values
Unit
min.
typ.
max.
AC characteristics
Transition frequency
I
C
= 20 mA, V
CE
= 5 V, f = 100 MHz
f
T
-
250
-
MHz
Collector-base capacitance
V
CB
= 10 V, f = 1 MHz
C
cb
-
2.5
-
pF
Emitter-base capacitance
V
EB
= 0.5 V, f = 1 MHz
C
eb
-
11
-
Short-circuit input impedance
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz
BC857AT
BC857BT
h
11e
-
-
2.7
4.5
-
-
k
Open-circuit reverse voltage transf.ratio
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz
BC857AT
BC857BT
h
12e
-
-
1.5
2
-
-
10
-4
Short-circuit forward current transf.ratio
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz
BC857AT
BC857BT
h
21e
-
-
200
330
-
-
-
Open-circuit output admittance
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz
BC857AT
BC857BT
h
22e
-
-
18
30
-
-
S
BC857T
Nov-29-2001
4
Total power dissipation
P
tot
= f (T
S
)
0
20
40
60
80
100
120 °C
150
T
S
0
50
100
150
200
mW
300
P
tot
Permissible Pulse Load
R
thJS
= f (t
p
)
10
-6
10
-5
10
-4
10
-3
10
-2
10
0
s
t
p
-1
10
0
10
1
10
2
10
3
10
K/W
R
thJS
D=0.5
0.2
0.1
0.05
0.02
0.01
0.005
0
Permissible Pulse Load
P
totmax
/ P
totDC
= f (t
p
)
10
-6
10
-5
10
-4
10
-3
10
-2
10
0
s
t
p
0
10
1
10
2
10
3
10
P
totmax
/ P
totDC
D=0
0.005
0.01
0.02
0.05
0.1
0.2
0.5
BC857T
Nov-29-2001
5
Transition frequency f
T
= f (I
C
)
V
CE
= 5V
10
10
10
10
EHP00378
f
mA
MHz
-1
0
1
2
5
T
3
10
10
2
1
10
5
5
5
C
Collector-base capacitance C
cb
= f (V
CB
)
Emitter-base capacitance C
eb
= f (V
EB
)
10
-1
10
0
10
1
V
V
CB
,V
EB
0
2
4
6
8
10
pF
14
C
cb
,
C
eb
C
cb
C
eb
Collector cutoff current I
CBO
= f (T
A
)
V
CB
= 30V
10
0
50
100
150
EHP00381
T
A
5
10
10
nA
10
CB0
5
5
5
10
10
4
3
2
1
0
-1
max
typ
C
Collector-emitter saturation voltage
I
C
= f (V
CEsat
), h
FE
= 20
10
0
EHP00380
V
CEsat
10
mA
10
10
2
1
0
-1
5
5
V
0.3
0.5
100
25
-50
0.1
0.2
0.4
C
C
C
C
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